Question

Найти молярную концентрацию 50%-ной серной кислоты р = 1,48 г/мл​

Answer 1

Ответ:

7,551 моль/литр

Объяснение:

Сm(H2SO4)=(1000*1.48*0.5):98=7,551

Answer 2

Molar concentration, also known as molarity, is a measure of the concentration of a substance in a solution. It is defined as the amount of solute (in moles) divided by the volume of the solution (in liters). To find the molar concentration of a solution, you need to know the amount of solute and the volume of the solution.

In this case, we have a 50% sulfuric acid solution with a density of 1.48 g/ml. To find the molar concentration, we need to convert the given information into the required units and apply the appropriate formula.

Convert the density to g/L

First, we need to convert the density from grams per milliliter (g/ml) to grams per liter (g/L). Since there are 1000 milliliters in a liter, we can use the following conversion factor:

1 g/ml = 1000 g/L

So, the density of the sulfuric acid solution in grams per liter is:

1.48 g/ml * 1000 g/L = 1480 g/L

Calculate the molar mass of sulfuric acid

Next, we need to determine the molar mass of sulfuric acid (H2SO4). We can do this by adding up the atomic masses of each element in the compound. The atomic masses of hydrogen (H), sulfur (S), and oxygen (O) are approximately 1 g/mol, 32 g/mol, and 16 g/mol, respectively.

Molar mass of H2SO4 = 2(1 g/mol) + 32 g/mol + 4(16 g/mol) = 98 g/mol

Convert the given percentage to grams

Since we have a 50% sulfuric acid solution, we can assume that 50% of the solution is sulfuric acid. To calculate the amount of sulfuric acid in grams, we can use the equation:

Mass of sulfuric acid (g) = Percentage * Mass of solution (g)

Mass of solution = Density * Volume

Given that the density of the solution is 1.48 g/ml, we can assume that the mass of 1 ml of the solution is 1.48 g.

So, the mass of sulfuric acid in grams is:

Mass of sulfuric acid (g) = 0.50 * 1.48 g/ml * Volume (ml)

Calculate the volume of the solution

To find the volume, we need to know the mass of the solution. We can calculate the volume using the formula:

Volume (ml) = Mass of solution (g) / Density (g/ml)

Let's assume we have 1000 ml of the solution. We can calculate the mass of the solution using the equation:

Mass of solution = Density * Volume

Mass of solution = 1.48 g/ml * 1000 ml = 1480 g

Calculate the molar concentration

Now that we have all the necessary information, we can calculate the molar concentration using the formula:

Molar concentration (M) = Mass of solute (g) / Molar mass (g/mol) / Volume of solution (L)

Substituting the values we obtained:

Molar concentration (M) = (0.50 * 1.48 g/ml * 1000 ml) / 98 g/mol / (1000 ml / 1000)

Simplifying the equation:

Molar concentration (M) ≈ 7.55 M

Therefore, the molar concentration of the 50% sulfuric acid solution is approximately 7.55 M.